Chapter 13 (2)
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What are the three parts of the brain stem?
- Medulla oblongata
Describe the midbrain.
- Contains nuclei that coordinate visual and auditory reflexes.
- Contains centers that help to maintain consciousness.
Describe the pons.
- Connects cerebellum to brain stem.
- Has tracts and relay centers.
- Contains nuclei that function in somatic and visceral motor control
Describe the medulla oblongata.
- Relays sensory information to other areas of brain stem and thalamus.
- Contains major centers that regulate autonomic function.
Describe the structure of a ventrivle of the brain.
- Cavity filled with cerebrospinal fluid.
- Lined with ependymal cells.
- Connected by narrow canals.
Describe the structure and location of the Lateral centricles.
- Contained within each cerebral hemisphere.
- Each connected to third ventricle by interventricular foramen.
- Separated medially by septum pellucidum.
- “Roof” partially formed by thick white matter tract connecting hemispheres (corpus callosum).
Describe the structure and location of the third ventricle.
- Contained within diencephalon.
- Connected to fourth ventricle by aqueduct of the midbrain (cerebral aqueduct).
Describe the structure and location of the fourth ventricle.
- Between pons of brain stem anteriorly and cerebellum posteriorly.
- Continuous with central canal of spinal cordcerebral aqueduct connects it to third ventricle.
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